Pipe joints or couplings – Essential catch – Resilient ring
Patent
1976-12-27
1979-01-09
Callaghan, Thomas F.
Pipe joints or couplings
Essential catch
Resilient ring
285356, F16L 3708
Patent
active
041335643
ABSTRACT:
A quick connect coupling is disclosed providing an integrally formed tube end assembly in which the wall of the tube is deformed to increase the diameter and is subsequently roll formed to produce a pair of axially spaced peripheral grooves to receive a snap lock ring and a seal. The inside diameter of the tube end within the grooves is substantially as large as the inside diameter of the remainder of the tube so that a substantial flow restriction does not result from the presence of the peripheral grooves. The material of the tube end is work hardened so that sufficient structural strength is provided even in the zone of the grooves. A smoothly curved rib is also formed in the tube wall to cooperate with a lock ring to permanently connect a tubular nut to the tube end after the device is initially connected as a quick connect coupling. The tubular nut is formed with a counterbore at its inner end to provide a radial wall and a cylindrical wall which receives the lock ring when the coupling is originally connected.
REFERENCES:
patent: 609030 (1898-08-01), Keller
patent: 2226826 (1940-12-01), Miller
patent: 2630338 (1953-03-01), Snyder
patent: 2914344 (1959-11-01), Anthes
patent: 3584902 (1971-06-01), Vyse
patent: 3596934 (1971-08-01), DeCenzo
patent: 3773360 (1973-11-01), Timbers
patent: 3855851 (1974-12-01), Paul, Sr.
patent: 3871691 (1975-03-01), Takagi et al.
patent: 3873138 (1975-03-01), Griffiths et al.
Browne Frederick S.
Sarson Charles R.
Callaghan Thomas F.
Dana Corporation
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